CA2008982A1 - Method, anchoring element and device for tensioning a rod - Google Patents
Method, anchoring element and device for tensioning a rodInfo
- Publication number
- CA2008982A1 CA2008982A1 CA002008982A CA2008982A CA2008982A1 CA 2008982 A1 CA2008982 A1 CA 2008982A1 CA 002008982 A CA002008982 A CA 002008982A CA 2008982 A CA2008982 A CA 2008982A CA 2008982 A1 CA2008982 A1 CA 2008982A1
- Authority
- CA
- Canada
- Prior art keywords
- rod
- ribs
- anchoring
- grooves
- flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims description 11
- 238000004873 anchoring Methods 0.000 title description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 5
- 239000011435 rock Substances 0.000 description 8
- 230000036316 preload Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/08—Quickly-detachable or mountable nuts, e.g. consisting of two or more parts; Nuts movable along the bolt after tilting the nut
- F16B37/0807—Nuts engaged from the end of the bolt, e.g. axially slidable nuts
- F16B37/0842—Nuts engaged from the end of the bolt, e.g. axially slidable nuts fastened to the threaded bolt with snap-on-action, e.g. push-on nuts for stud bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Heat Treatment Of Articles (AREA)
- Fluid-Damping Devices (AREA)
- Joining Of Building Structures In Genera (AREA)
- Manipulator (AREA)
- Jib Cranes (AREA)
Abstract
A B S T R A C T
A nut (15), for tensioning a rock-anchor-rod, has a tubular body (25) with a saw-tooth thread (28). The body (25) of the nut is divided, by a plurality of longitudinal slots, into segments (31). The said segments are connected together by cross-sectionally U-shaped resiliently flexible ribs (26). One end-face of the nut (15) has a convex-spherical flange (17) which bears against an anchor-plate. The slots (30) extend through the flange (17) as far as the inner wall of the ribs (26). Between the ribs (26), the flange (17) carries radial incisions (37) extending as far as the body (25) of the nut. As a result of this the segments (31) are tangentially resilient. In order to tension the anchor-rod, the nut (15) is pushed axially onto the saw-tooth thread of the rod. The jaws of a tensioning device engage in the thread at the free end of the rod and bear against the nut (15). When the said cheeks apply tension to the anchor-rod, the nut (15) is pressed to the anchor-plate. This ensures rapid and accurate preloading of the anchor-rod. (Fig. 3).
A nut (15), for tensioning a rock-anchor-rod, has a tubular body (25) with a saw-tooth thread (28). The body (25) of the nut is divided, by a plurality of longitudinal slots, into segments (31). The said segments are connected together by cross-sectionally U-shaped resiliently flexible ribs (26). One end-face of the nut (15) has a convex-spherical flange (17) which bears against an anchor-plate. The slots (30) extend through the flange (17) as far as the inner wall of the ribs (26). Between the ribs (26), the flange (17) carries radial incisions (37) extending as far as the body (25) of the nut. As a result of this the segments (31) are tangentially resilient. In order to tension the anchor-rod, the nut (15) is pushed axially onto the saw-tooth thread of the rod. The jaws of a tensioning device engage in the thread at the free end of the rod and bear against the nut (15). When the said cheeks apply tension to the anchor-rod, the nut (15) is pressed to the anchor-plate. This ensures rapid and accurate preloading of the anchor-rod. (Fig. 3).
Description
20085~8.~2 S P E C I F I C A T I O N
For the purpose of stabilizing rock, e.g. in tunnelling or mining, tension-rods are used with a rod anchored in the rock and having a nut screwed to its free end. The said nut bears against an anchor-plate which bears against the rock. In the case of steel tension-rods, the nut is usually tightened with a torque-wrench. This method of tensioning is, however, highly inaccurate since the torque applied with the wrench fluctuates considerably and settling of the anchor-plate may lead to uncontrolled reduction of rod-tension.
This method of tensioning has also been unsatisfactory in the case of rods made of fibre-reinforced synthetic materials since such materials have low torsional strength.
15A method according to the preamble to claim 1 is known to have been used previously. This is a method for tensioning rods made of fibre-reinforced synthetic materials.
A known tension-rod for this purpose is described in US
~`Patent 4,523,880. The free end of the rod carries a saw-tooth thread onto which a nut is screwed. The nut bears against an anchor-plate. Tensioning is effected by means of a device using an auxiliary nut which is screwed to the free end of the rod outside the main nut. The auxiliary nut is axially displaceable, in the frame of the device, by means of a hydraulic cylinder. The frame comprises a tripod which Z00~98~
bears against the rock outside the anchor-plate. When the cylinder is actuated, the auxiliary nut preloads the anchor-rod, after which the main nut can be screwed manually up to the anchor-plate. This method and this device are quite complicated.
It is the purpose of the present invention to develop the above-mentioned method, anchoring-element and tensioning-device so that the rod may be tensioned rapidly.
This purpose is accomplished by the characteristics set forth in claims 1, 2 and 8.
An example of embodiment of the invention is explained hereinafter in connection with the drawings attached hereto, wherein:
Fig. 1 is an axial section through a tensioning-device;
Fig. 2 is an axial section along the line II-II in Fig.l;
Fig. 3 is an axial section through a nut along the line III-III in Fig.4;
Figs. 4 and 5 are end-elevations of the nut according to Fig. 3 in the direction of arrows 4 and 5 in Fig.3, and Fig. 6 is a cross-section along the line VI-VI in Fig.3.
The tensioning-device 1 shown in Figs. 1 and 2 is used to tension a fibre-reinforced synthetic anchor-rod 2.
The said rod is shown in a drill-hole 3 in rock 4, only a section 5, adjacent to free end thereof, being visible. The anchoring end may be designed according to US Patent '' ', ', ':
.
~008982 4,523,880, for example. Cast onto end-section 5 is a sleeve 6 made of a fibre-reinforced synthetic material, the exterior of which carries a saw-tooth thread 7. The saw-tooth grooves 8 of thread 7 have flat sides 9 facing towards the free end of the rod and steep sides 10 facing away from the end of the rod.
Fitted to thread 7 is a nut 15 acting as an anchoring element. This bears with the convex-spherical outer surface 16 of an end-flange 17 against the concave-spherical surface 18 of an anchor-plate 19.
Anchor-plate 19 bears against rock 4 with ribs 20 designed to crumple.
Nut 15 is shown in greater detail in Figs. 3 to 6.
It is injection-moulded out of a fibre-reiforced synthetic material and consists of a tubular body 25 with moulded ribs 26 and an end-flange 17. Formed in axial passage 27 in body 25 is a saw-tooth nut-thread 28 with saw-tooth grooves 29 which match grooves 8. Body ?5 is divided by twelve longitudinal slots 30 into twelve segments 31. Ribs 26 are cross-sectionally U-shaped with radially directed U-legs 32 and a somewhat roof-shaped connecting section 33. Ribs 26 are resiliently flexible. They join segments 31 together so that while the said ribs can spring tangentially in relation to each other, they are radially rigid in relation to ribs 26. Towards flange 17, sections 33 merge into semi-cylindrical webs 34 arranged at an angle to the axis of tubular body 25. The, said webs support the outer areas of 2~0~98~
flange 17, projecting beyond the outside diameter of ribs 26, against the latter. Sections 33 form a double hexagon 39, allowing nut 15 to be tightened or slackened with a wrench.
Facing spherical outer surface 16, end-flange 17 has a concave-spherical inner surface 35. The space enclosed by legs 32, section 33 and web 34 extends, as an opening, through flange 17 so that, in the said flange, slots 30 extend as far as the inner wall of webs 34. Between ribs 26, end-flange 17 has radial incisions 37 extending as far as tubular body 25. As a result of this design, the resilient flexibility of ribs 26 and webs 34 is not impaired by flange 17. At the opposite end, the space enclosed by ribs 26 is closed off by elements 38. In these elements slots 30 again extend radially as far as the inner wall of sections 33.
According to Fig 1 tensioning device 1 has a housing 44. At the rear axial end, housing 44 is screwed to piston-rod 45 of a single-acting hydraulic-cylinder unit 46.
Housing 44 has a concavely cambered end-surface 47 which bears against concave-spherical inner surface 35 of flange 17, and an axial opening 48 surrounding ribs 26. End-surface 47 acts as a support for tensioning device 1 on nut 15.
Screwed to the front end of cylinder 50 of hydraulic unit 46 is a ring 51 carrying four axially parallel rods 52. Screwed to the front end of each rod 52 is a carrier 53 with a passage 54 through which sleeve 6 passes. The front end of carrier 53 has four radial T-shaped grooves 55 in which four jaws 56 are adapted to move radially. These jaws have 2~)0~982 saw-tooth nut-thread grooves engaging in grooves 8 in rod 2.
Arranged on the back of carrier 53 is a coaxial actuating ring 58 which is axially displaceable on rods 52 and is preloaded in relation to carrier 53 by means of compression rings 59. A sleeve 60 is displaceable upon each of two rods 52a, the said sleeves being rigidly connected to ring 58 and projecting rearwardly through a passage 61 in housing 44.
Secured to the rear end of each sleeve 60 is an actuating grip 62 adjacent a handle formed on ring 51. Secured to actuating ring 58 are four pins 64 running at an angle to the axis of housing 44. Pins 64 pass through passages 65 in jaws 56. In Fig. 1 they are shown at an angle of 45.
The device illustrated operates as follows: after anchor-rod 2 has been placed in drill-hole 3, anchor-plate 19 is placed against rock 4 and nut 15 is pushed onto sleeve 6 until it bears against anchor-plate 19. Because of tangentially resilient segments 31, nut 15 need merely be moved axially which is much faster than screwing.
Tensioning-device 1 is now held by grip 63 and actuating grip 62 is simultaneously drawn back. This causes ring 58 to move away from carrier 53 against the force of springs 59, while pins 64 move jaws 56 radially outwardly. This makes it possible to bring device 1 over sleeve 6 until it bears against end-surface 47. When actuating grip 62 is released, springs 59 urge ring 58 forwardly and pins 64 move jaws 56 radially inwardly so that jaw-grooves 57 engage with rod-grooves 8. Pressurized oil is now fed to hydraulic unit 6 2UC~89~32 46. Piston-rod 45 pushes housing 44 and thus end-surface 47 forwardly and cylinder 50 pulls jaws 56 rear-wardly by means of rods 52 and carrier 53. This tensions rod 2. At the same time nut 15 is pressed to anchor-plate 19 by the counter-force and again thread-grooves 8 are jumped over by the tangential springing of segments 31. Cambered end-surface 47 assists in expanding nut 15. Since the full preload force of rod 2, during preloading, also presses nut 15 to anchor-plate 19, ribs 20 of the latter bear firmly against rock 4 so that, when hydraulic unit 46 is released, accurate rod-preloading, exactly meterable, is obtained by hydraulic pressure. As soon as hydraulic unit 46 has been released, a pull on actuating grip 62 opens jaws 56 and tensioning device 1 is removed axially from the free end of the rod. The lS radial components of the supporting force on end-flange 17, which are transferred directly to segments 31 by radially rigid ribs 26, compress segments 31 radially, thus keeping nut-thread 28 firmly in engagement with the thread on the rod. In addition to this, this radial compression greatly improves the transfer of force from sleeve 6 to anchor-rod 2.
The described tensioning device 1 and nut lS make it possible to tension anchor-rod extremely quickly and accuracy and reproducibility of the preload are considerably improved as compared with previously known devices. This allows optimal use to be made of the strength of anchor-rod 2.
The anchoring-element (nut lS) and the tensioning ;: .
method described are also suitable in principle if rod-grooves 8, anchoring-element grooves 29, and jaw-grooves 57 are annular and thus do not form threads. In this case, rod cross-sections other than circular may be considered.
For the purpose of stabilizing rock, e.g. in tunnelling or mining, tension-rods are used with a rod anchored in the rock and having a nut screwed to its free end. The said nut bears against an anchor-plate which bears against the rock. In the case of steel tension-rods, the nut is usually tightened with a torque-wrench. This method of tensioning is, however, highly inaccurate since the torque applied with the wrench fluctuates considerably and settling of the anchor-plate may lead to uncontrolled reduction of rod-tension.
This method of tensioning has also been unsatisfactory in the case of rods made of fibre-reinforced synthetic materials since such materials have low torsional strength.
15A method according to the preamble to claim 1 is known to have been used previously. This is a method for tensioning rods made of fibre-reinforced synthetic materials.
A known tension-rod for this purpose is described in US
~`Patent 4,523,880. The free end of the rod carries a saw-tooth thread onto which a nut is screwed. The nut bears against an anchor-plate. Tensioning is effected by means of a device using an auxiliary nut which is screwed to the free end of the rod outside the main nut. The auxiliary nut is axially displaceable, in the frame of the device, by means of a hydraulic cylinder. The frame comprises a tripod which Z00~98~
bears against the rock outside the anchor-plate. When the cylinder is actuated, the auxiliary nut preloads the anchor-rod, after which the main nut can be screwed manually up to the anchor-plate. This method and this device are quite complicated.
It is the purpose of the present invention to develop the above-mentioned method, anchoring-element and tensioning-device so that the rod may be tensioned rapidly.
This purpose is accomplished by the characteristics set forth in claims 1, 2 and 8.
An example of embodiment of the invention is explained hereinafter in connection with the drawings attached hereto, wherein:
Fig. 1 is an axial section through a tensioning-device;
Fig. 2 is an axial section along the line II-II in Fig.l;
Fig. 3 is an axial section through a nut along the line III-III in Fig.4;
Figs. 4 and 5 are end-elevations of the nut according to Fig. 3 in the direction of arrows 4 and 5 in Fig.3, and Fig. 6 is a cross-section along the line VI-VI in Fig.3.
The tensioning-device 1 shown in Figs. 1 and 2 is used to tension a fibre-reinforced synthetic anchor-rod 2.
The said rod is shown in a drill-hole 3 in rock 4, only a section 5, adjacent to free end thereof, being visible. The anchoring end may be designed according to US Patent '' ', ', ':
.
~008982 4,523,880, for example. Cast onto end-section 5 is a sleeve 6 made of a fibre-reinforced synthetic material, the exterior of which carries a saw-tooth thread 7. The saw-tooth grooves 8 of thread 7 have flat sides 9 facing towards the free end of the rod and steep sides 10 facing away from the end of the rod.
Fitted to thread 7 is a nut 15 acting as an anchoring element. This bears with the convex-spherical outer surface 16 of an end-flange 17 against the concave-spherical surface 18 of an anchor-plate 19.
Anchor-plate 19 bears against rock 4 with ribs 20 designed to crumple.
Nut 15 is shown in greater detail in Figs. 3 to 6.
It is injection-moulded out of a fibre-reiforced synthetic material and consists of a tubular body 25 with moulded ribs 26 and an end-flange 17. Formed in axial passage 27 in body 25 is a saw-tooth nut-thread 28 with saw-tooth grooves 29 which match grooves 8. Body ?5 is divided by twelve longitudinal slots 30 into twelve segments 31. Ribs 26 are cross-sectionally U-shaped with radially directed U-legs 32 and a somewhat roof-shaped connecting section 33. Ribs 26 are resiliently flexible. They join segments 31 together so that while the said ribs can spring tangentially in relation to each other, they are radially rigid in relation to ribs 26. Towards flange 17, sections 33 merge into semi-cylindrical webs 34 arranged at an angle to the axis of tubular body 25. The, said webs support the outer areas of 2~0~98~
flange 17, projecting beyond the outside diameter of ribs 26, against the latter. Sections 33 form a double hexagon 39, allowing nut 15 to be tightened or slackened with a wrench.
Facing spherical outer surface 16, end-flange 17 has a concave-spherical inner surface 35. The space enclosed by legs 32, section 33 and web 34 extends, as an opening, through flange 17 so that, in the said flange, slots 30 extend as far as the inner wall of webs 34. Between ribs 26, end-flange 17 has radial incisions 37 extending as far as tubular body 25. As a result of this design, the resilient flexibility of ribs 26 and webs 34 is not impaired by flange 17. At the opposite end, the space enclosed by ribs 26 is closed off by elements 38. In these elements slots 30 again extend radially as far as the inner wall of sections 33.
According to Fig 1 tensioning device 1 has a housing 44. At the rear axial end, housing 44 is screwed to piston-rod 45 of a single-acting hydraulic-cylinder unit 46.
Housing 44 has a concavely cambered end-surface 47 which bears against concave-spherical inner surface 35 of flange 17, and an axial opening 48 surrounding ribs 26. End-surface 47 acts as a support for tensioning device 1 on nut 15.
Screwed to the front end of cylinder 50 of hydraulic unit 46 is a ring 51 carrying four axially parallel rods 52. Screwed to the front end of each rod 52 is a carrier 53 with a passage 54 through which sleeve 6 passes. The front end of carrier 53 has four radial T-shaped grooves 55 in which four jaws 56 are adapted to move radially. These jaws have 2~)0~982 saw-tooth nut-thread grooves engaging in grooves 8 in rod 2.
Arranged on the back of carrier 53 is a coaxial actuating ring 58 which is axially displaceable on rods 52 and is preloaded in relation to carrier 53 by means of compression rings 59. A sleeve 60 is displaceable upon each of two rods 52a, the said sleeves being rigidly connected to ring 58 and projecting rearwardly through a passage 61 in housing 44.
Secured to the rear end of each sleeve 60 is an actuating grip 62 adjacent a handle formed on ring 51. Secured to actuating ring 58 are four pins 64 running at an angle to the axis of housing 44. Pins 64 pass through passages 65 in jaws 56. In Fig. 1 they are shown at an angle of 45.
The device illustrated operates as follows: after anchor-rod 2 has been placed in drill-hole 3, anchor-plate 19 is placed against rock 4 and nut 15 is pushed onto sleeve 6 until it bears against anchor-plate 19. Because of tangentially resilient segments 31, nut 15 need merely be moved axially which is much faster than screwing.
Tensioning-device 1 is now held by grip 63 and actuating grip 62 is simultaneously drawn back. This causes ring 58 to move away from carrier 53 against the force of springs 59, while pins 64 move jaws 56 radially outwardly. This makes it possible to bring device 1 over sleeve 6 until it bears against end-surface 47. When actuating grip 62 is released, springs 59 urge ring 58 forwardly and pins 64 move jaws 56 radially inwardly so that jaw-grooves 57 engage with rod-grooves 8. Pressurized oil is now fed to hydraulic unit 6 2UC~89~32 46. Piston-rod 45 pushes housing 44 and thus end-surface 47 forwardly and cylinder 50 pulls jaws 56 rear-wardly by means of rods 52 and carrier 53. This tensions rod 2. At the same time nut 15 is pressed to anchor-plate 19 by the counter-force and again thread-grooves 8 are jumped over by the tangential springing of segments 31. Cambered end-surface 47 assists in expanding nut 15. Since the full preload force of rod 2, during preloading, also presses nut 15 to anchor-plate 19, ribs 20 of the latter bear firmly against rock 4 so that, when hydraulic unit 46 is released, accurate rod-preloading, exactly meterable, is obtained by hydraulic pressure. As soon as hydraulic unit 46 has been released, a pull on actuating grip 62 opens jaws 56 and tensioning device 1 is removed axially from the free end of the rod. The lS radial components of the supporting force on end-flange 17, which are transferred directly to segments 31 by radially rigid ribs 26, compress segments 31 radially, thus keeping nut-thread 28 firmly in engagement with the thread on the rod. In addition to this, this radial compression greatly improves the transfer of force from sleeve 6 to anchor-rod 2.
The described tensioning device 1 and nut lS make it possible to tension anchor-rod extremely quickly and accuracy and reproducibility of the preload are considerably improved as compared with previously known devices. This allows optimal use to be made of the strength of anchor-rod 2.
The anchoring-element (nut lS) and the tensioning ;: .
method described are also suitable in principle if rod-grooves 8, anchoring-element grooves 29, and jaw-grooves 57 are annular and thus do not form threads. In this case, rod cross-sections other than circular may be considered.
Claims (10)
1. A method for tensioning a rod (2) comprising a plurality of equally spaced, saw-tooth grooves (8) arranged in a row adjacent the free end of section (5) of the rod, a tension-element (56) being brought into engagement with the grooves (8) of section (5) of the rod, the rod (2) being tensioned with the tension-element (56) by means of a tensioning-device (1), and an anchoring-element (15), engaging in the grooves (8) in section (5) of the rod, being brought to bear against a support (19), thereupon the tensioning-device (1) is released and the tension-element (56) is removed, characterized in that when the rod (2) is tensioned, the tensioning-device (1) bears against the anchoring-element (15) and, simultaneously with the tensioning of the rod (2), the anchoring-element (15) is pressed to the support (19).
2. An anchoring-element for the implementation of the method according to claim 1, comprising a tubular body (25) with saw-tooth grooves (29) in an axial passage (27) engaging with saw-tooth grooves (8) in a rod (2) and having radially projecting ribs (26) extending axially and integral with tubular body (25), characterized in that the said tubular body is divided into segments (31) by axial slots (30); and in that the ribs (26) are cross-sectionally U-shaped, are resiliently flexible and connect the segments (31) together, so that the said segments are connected to the said ribs tangentially flexibly but radially inflexibly.
3. An anchoring-element according to claim 2, characterized in that an end-flange (17) is formed onto one axial end of each rib; in that the slots (30) extend through the said end-flange, projecting thereinto almost as far as the inner wall of the ribs (26); and in that radial incisions (37) are formed in the end-flange (17), from the outside, between the ribs (26), the said incisions projecting into the area of the body.
4. An anchoring-element according to claim 3, characterized in that the end-flange (17) extends radially over the outside diameter of the ribs (26); in that the said flange has a convex-spherical outer surface (16) and a concave-spherical inner surface (35); and in that the part of the end-flange (17) outside of the ribs (26) is supported upon the said ribs by webs (34).
5. An anchoring-element according to one of claims 2 to 4, characterized in that the grooves (29) of the body (25) are spiral and form a nut-thread (28).
6. An anchoring-element according to claim 5, characterized in that it comprises twelve slots (30) and twelve ribs (26); and in that all of the ribs (26) comprise, radially outwardly, a roof-shaped section (33) as seen cross-sectionally, the said sections (33) together forming a double-hexagon (39) for engagement with a double-hexagon wrench.
7. An anchoring-element according to one of claims 2 to 6, characterized in that it is made of a fibre-reinforced synthetic material.
8. A tensioning device for the implementation of the method according to claim 1, comprising a housing (44) upon which a tension-element (56), having saw-tooth grooves (57) for engagement with saw-tooth grooves (8), at an end-section (5) adjacent the free end of a rod (2), is axially displaceable; comprising a supporting-element (47) secured to the housing (44) and an actuating member (46) for shifting the tension-element (56) axially in relation to the supporting-element (47), characterized in that the supporting-element (47) comprises a coaxial opening (48) through which the rod (2) passes and, for support against an anchoring-element (15) placed upon the rod (2), it is provided with saw-tooth grooves (29) for engagement with the grooves (8) in the rod (2).
9. A device according to claim 8, characterized in that the tension-element comprises a plurality of jaws (56) which are adapted to be shifted from a basic position in which the grooves (57) may be brought into engagement with the grooves (8) in the rod (2), to a radially disengaged position by at least the radial depth of the said grooves (57).
10. A device according to claim 3 or 9, characterized in that the supporting-element is a convexly cambered end-surface (47) of the housing (44) bearing upon a concavely spherical inner surface (35) of an end-flange (17) of the anchoring-element (15).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH401/89-9 | 1989-02-06 | ||
| CH40189 | 1989-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2008982A1 true CA2008982A1 (en) | 1990-08-06 |
Family
ID=4186185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002008982A Abandoned CA2008982A1 (en) | 1989-02-06 | 1990-01-31 | Method, anchoring element and device for tensioning a rod |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5022791A (en) |
| EP (1) | EP0383723B1 (en) |
| JP (1) | JPH0355399A (en) |
| AT (1) | ATE94948T1 (en) |
| AU (1) | AU630915B2 (en) |
| CA (1) | CA2008982A1 (en) |
| DE (1) | DE59002778D1 (en) |
| NO (1) | NO900391L (en) |
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| JP2004076656A (en) * | 2002-08-20 | 2004-03-11 | Ntn Corp | Rocker arm |
| US20040167524A1 (en) * | 2002-09-06 | 2004-08-26 | Jackson Roger P. | Anti-splay medical implant closure with central multi-surface insertion and removal aperture |
| US8282673B2 (en) | 2002-09-06 | 2012-10-09 | Jackson Roger P | Anti-splay medical implant closure with multi-surface removal aperture |
| US20040167525A1 (en) * | 2002-09-06 | 2004-08-26 | Jackson Roger P. | Anti-splay medical implant closure with multi-stepped removal counterbore |
| US8876868B2 (en) | 2002-09-06 | 2014-11-04 | Roger P. Jackson | Helical guide and advancement flange with radially loaded lip |
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| WO2012128825A1 (en) | 2011-03-24 | 2012-09-27 | Jackson Roger P | Polyaxial bone anchor with compound articulation and pop-on shank |
| WO2013106217A1 (en) | 2012-01-10 | 2013-07-18 | Jackson, Roger, P. | Multi-start closures for open implants |
| US8911478B2 (en) | 2012-11-21 | 2014-12-16 | Roger P. Jackson | Splay control closure for open bone anchor |
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| US8852239B2 (en) | 2013-02-15 | 2014-10-07 | Roger P Jackson | Sagittal angle screw with integral shank and receiver |
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| US9451993B2 (en) | 2014-01-09 | 2016-09-27 | Roger P. Jackson | Bi-radial pop-on cervical bone anchor |
| US10064658B2 (en) | 2014-06-04 | 2018-09-04 | Roger P. Jackson | Polyaxial bone anchor with insert guides |
| US9597119B2 (en) | 2014-06-04 | 2017-03-21 | Roger P. Jackson | Polyaxial bone anchor with polymer sleeve |
| CN109973479B (en) * | 2019-04-17 | 2023-12-22 | 浙江卓远机电科技股份有限公司 | Anti-drop and convenient to detach's clamp connection structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1143005A (en) * | 1914-11-19 | 1915-06-15 | William S Weston | Crusher-shaft nut. |
| US3151653A (en) * | 1959-06-17 | 1964-10-06 | Victor F Zahodfakin | Quick-locking fastening device |
| FR1327230A (en) * | 1962-04-05 | 1963-05-17 | Anciens Etablissements Goldenb | Anchoring device and clamping device for this device |
| US3653634A (en) * | 1970-10-23 | 1972-04-04 | Grands Soc D | Stepwise-operating power apparatus |
| AU2691671A (en) * | 1971-03-24 | 1972-09-28 | ||
| US4106752A (en) * | 1976-05-04 | 1978-08-15 | Buildinter Ag | Jack for stressing concrete re-inforcement elements |
| DE2903694A1 (en) * | 1979-01-31 | 1980-08-14 | Gebirgssicherung Gmbh | MOUNTAIN ANCHOR |
| DE3125166C2 (en) * | 1981-06-26 | 1993-12-02 | Dyckerhoff & Widmann AG, 8000 München | Method for producing a post-tensionable grouting anchor |
| IT1133577B (en) * | 1980-06-12 | 1986-07-09 | Romualdo Macchi | JACK FOR TENSIONING OF CABLES FORMED FROM WIRE STRUCTURES OR LINES COVERED IN REINFORCED CONCRETE STRUCTURES |
| NO159678C (en) * | 1982-05-14 | 1989-01-25 | Weidmann H Ag | MOUNTAIN SECURING ANCHOR. |
| ATE36035T1 (en) * | 1985-01-17 | 1988-08-15 | Weidmann H Ag | ANCHORS FOR SECURING WALLS IN CAVITY STRUCTURES. |
| FR2584150B1 (en) * | 1985-06-28 | 1988-04-08 | Inst Francais Du Petrole | REMOTE HANGING AND TENSIONING SYSTEM OF AN ELONGATED ELEMENT |
| US4846444A (en) * | 1988-07-05 | 1989-07-11 | Michael Vassalotti | Stud tensioning and tighetning apparatus |
-
1990
- 1990-01-29 NO NO90900391A patent/NO900391L/en unknown
- 1990-01-31 CA CA002008982A patent/CA2008982A1/en not_active Abandoned
- 1990-02-02 AU AU49019/90A patent/AU630915B2/en not_active Ceased
- 1990-02-05 EP EP90810080A patent/EP0383723B1/en not_active Expired - Lifetime
- 1990-02-05 JP JP2024583A patent/JPH0355399A/en active Pending
- 1990-02-05 AT AT90810080T patent/ATE94948T1/en not_active IP Right Cessation
- 1990-02-05 DE DE90810080T patent/DE59002778D1/en not_active Expired - Fee Related
- 1990-02-06 US US07/475,495 patent/US5022791A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ATE94948T1 (en) | 1993-10-15 |
| NO900391L (en) | 1990-08-07 |
| NO900391D0 (en) | 1990-01-29 |
| EP0383723A1 (en) | 1990-08-22 |
| AU630915B2 (en) | 1992-11-12 |
| US5022791A (en) | 1991-06-11 |
| EP0383723B1 (en) | 1993-09-22 |
| DE59002778D1 (en) | 1993-10-28 |
| JPH0355399A (en) | 1991-03-11 |
| AU4901990A (en) | 1990-08-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |